Dlesex



I 2 sheets Sh eet 1. J. BROOKIE & M. W. W. MAGKIE.

(No Model.)

ROTARY ENGINE.

Patented Dec. 28, 1886.

N. PEIERS. Fholo-Lllmgnpher, Wumn mn, D4 0 (No Model.) v I .2 Sheets-Sheet 2.

J. BRDGKIB 81; M W. W. NIAOKIEQ ROTARY ENGINE. I No. 355,131; Patented Dec. 28, 1886.

UNITED STATES PATENT OFFICE.

JAMES BROOKIE, OF BRIXTON, COUNTY OF SURREY, AND MATTHEW W. W.

MAGKIE, OF TURKS HEAD YARD, DLESEX, ENGLAND.

ROTARY TURNMILL STREET, COUNTY OF MID- ENGINE.

- SPECIFICATION forming part of Letters Patent No. 355,131, dated December 28, 1886.

Application filed August 19, 1586. Serial No. 211.311. (No model.) Patented in England July 18, 1885, No. 8,700.

To all whom it may concern:

Be it known that we, JAMES BROOKIE and MATTHEW WILLIAM WALLBANK MACKIE, subjects of the Queen of Great Britain, residing, respectively, at Saltown Road, Brixton, in the county of Surrey, England, and at Turks Head Yard, Turumill Street, in the county of Middlesex, England, have invented a new and useful Rotary Engine Worked by Steam or other Elastic Fluid, (for which we have made application for a patent in Great Britain, dated July 18, 1885, No. 8,700,) of which the following is a specification.

Our invention relates to a construction of I 5 rotary engine that can be worked by steam or other elastic fluid; and it consists in the construction and combination of devices hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure 1 is a transverse section, and Fig. 2 is a longitudinal section.

Within an external stationary cylindrical casing, A, covered at both ends, there is fitted 2 5 an inner cylindrical body, B, free to revolve within A. In the middle of the body B there is a slot in which is fitted a rectangular piston,.P, that can slide along the whole length of the slot. Through the piston P passes a crank-pin, G, which at each end is fixed to a disk, D, each of these disks forming part of (or it might be fixed on) a shaft, S, that passes through a stuffing-box in the end cover eccentrio to the cylinder A to such an extent that the circular path of the crank-pin (indicated by the dotted circle B, Fig. 1) passes through the center of the cylinder A. Each of the disks D is sunk in a circular recess in the end cover, so that the face of the disk is on the same plane with the inner surface of the cover. The body B is at one end made with a part, b, of its length largerin diameter than the rest, and the case A is correspondingly recessed to admit this enlarged part. This enlargement, 5 it isto be understood, is not necessary for the action of the engine; but it gives convenience for formation of the supply and exhaust ports in such a manner that the face of the enlarge- 7 ment b operatesas a slide-valve, opening and closing these ports in proper sequence.

An induction-pipe, 'I,' and an eduction-pipe, E, open, respectively, into passages extending from F to F and from G to G, facing the back of the enlarged part b of the body- B, these passages being elongated, so as to maintain for suitable parts of each revolution communica tions between the pipes I and E and the slot in which the piston 1? works on each side of the piston. Assuming steam to be supplied by the pipe I, and to be led to a discharge, E, 60 the engine works as follows: While the part of the slot above the piston Premains :in communication with I, and the part below P being in communication with E, the piston is pressed downward along the slot; but as its movement is determined by the crank-pin C, it can only move along the slot by causing the whole body B to revolve, and the crank C to revolve with double the angular velocity. Thus during the time that the piston travels along the whole length of the slot the body B makes half a revolution, andthe crank G makes a whole revolution; also, the steam that during this time enters and expands in the slot, pro-. pelling the piston from the one end to the other, now escapes by the outlet to E, while fresh steam from I enters the slot on the other side of the piston and propels it back along the slot. The passage F to F is shown in Fig. 1 of such length as'to admit steam to the slot of B, while B performs about one-quarter of a revolution and the piston makes about half its stroke, the other half being performed while the steam already admitted expands within the slot. By shortening the passage from F to F the cut-off would be sooner effected. The passage G to G is made to extend nearly half-way round the cylinder, so that steam is free to escape during nearly the whole back stroke of the piston.

At the middle of each stroke of the piston there is what may be termed a dead-point, the crank-pin 0 having then no effect in cansingB to revolve. In order to maintain revolution of B while it is passing this dead-point, 5 a small stud. or roller, T, projecting from one of the disks D diametrically opposite the crankto crank-pin to traverse a transverse slot of a cylindrical body revolving within a casing, and such, therefore, we do not broadly claim.

Having thus described the nature of our invention and the best way we know of carry 1 5 ing it out in practice, we claim- 1.' The combination of the stationary cylindrical casing A, having end covers provided with annular recesses, the revolving cylindrical body B, having the diametric slot, and the rectangular piston P, arranged to traverse the slot, with the circular disks D, sunk in the annular recesses of the end covers of the casing and having a shaft, S, extended through the casing, and the crank-pin 0, extending entirely across the revolving body and through the piston and secured at its opposite ends, respectively, to the circular disks, substantially as described.

2. The combination of the stationary cylindrical casing A, having the induction and eduction pipes I and E and elongated induction and eduction passages extending in a circular path around the casing, in which the steam works expansivel y, with the revolving cylindrical body B, having the diametric slot, the

piston P, arranged to traverse the slot, the circular disks D, seated in the casing and having a shaft, S, continued through the casing, and

the crank-pin 0, extending entirely across the revolving body and through the piston and connected at its opposite ends, respectively, to the circular disks, substantially as described.

3. The combination of the stationary cylinder A, the revolving cylindrical body B, seated in the cylinder and provided with a diametric slot, a piston, P, slidable along said slot, a crank-pin, C, on which the piston is mounted, and two shafts, S, each having at its inner end a circular disk, D, to which disks the ends of the crank-pin are connected, substantially as described. 7

4. In a rotary engine wherein a rectangular piston, P, mounted on crank-pin C, reciprocates along a slot diametrically formed in a cylindrical body, B, revolving within a stationary casing, A, the shafts S S and the sunk dies D D thereon, carrying the crank-pin G, and opposite the crank the stud or roller T on one of the said disks engaged in slots ton the face of the cylindrical body B, substantially as and for the purpose herein set forth.

In testimony whereof we have signed our names to this specification, in the presenceof two subscribing witnesses, this 6th day of August, A. D. 1886.

JAMES BROCKIE. M. W. W. MAOKIE.

PatentA gents, 28 Southampton Buildings, London, W. 0. g 

